{"id":601,"date":"2024-01-02T09:01:01","date_gmt":"2024-01-02T01:01:01","guid":{"rendered":""},"modified":"2024-01-02T09:01:01","modified_gmt":"2024-01-02T01:01:01","slug":"\u6570\u7ec4\u53bb\u91cd\u65b9\u6cd5\uff08\u5305\u62ec\u590d\u6742\u7c7b\u578b\uff09","status":"publish","type":"post","link":"https:\/\/mushiming.com\/601.html","title":{"rendered":"\u6570\u7ec4\u53bb\u91cd\u65b9\u6cd5\uff08\u5305\u62ec\u590d\u6742\u7c7b\u578b\uff09"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<pre><code class=\"prism language-javascript\"><span class=\"token comment\">\/\/ 1.ES6 Set\u53bb\u91cd\uff08ES6\u4e2d\u6700\u5e38\u7528\uff09<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">unique<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n  <span class=\"token keyword\">return<\/span> Array<span class=\"token punctuation\">.<\/span><span class=\"token function\">from<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Set<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n<span class=\"token punctuation\">}<\/span>\n<span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n <span class=\"token comment\">\/\/[1, \"true\", true, 15, false, undefined, null, NaN, \"NaN\", 0, \"a\", {}, {}]<\/span>\n\n<span class=\"token comment\">\/\/ 2.\u5229\u7528for\u5d4c\u5957for\uff0c\u7136\u540esplice\u53bb\u91cd\uff08ES5\u4e2d\u6700\u5e38\u7528\uff09<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>            \n        <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> i<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&lt;<\/span>arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n            <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> j<span class=\"token operator\">=<\/span>i<span class=\"token operator\">+<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">&lt;<\/span>arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> j<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n                <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token operator\">==<\/span>arr<span class=\"token punctuation\">[<\/span>j<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>         <span class=\"token comment\">\/\/\u7b2c\u4e00\u4e2a\u7b49\u540c\u4e8e\u7b2c\u4e8c\u4e2a\uff0csplice\u65b9\u6cd5\u5220\u9664\u7b2c\u4e8c\u4e2a<\/span>\n                    arr<span class=\"token punctuation\">.<\/span><span class=\"token function\">splice<\/span><span class=\"token punctuation\">(<\/span>j<span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n                    j<span class=\"token operator\">--<\/span><span class=\"token punctuation\">;<\/span>\n                <span class=\"token punctuation\">}<\/span>\n            <span class=\"token punctuation\">}<\/span>\n        <span class=\"token punctuation\">}<\/span>\n<span class=\"token keyword\">return<\/span> arr<span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span>\n<span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n    console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token comment\">\/\/[1, \"true\", 15, false, undefined, NaN, NaN, \"NaN\", \"a\", {\u2026}, {\u2026}] \/\/NaN\u548c{}\u6ca1\u6709\u53bb\u91cd\uff0c\u4e24\u4e2anull\u76f4\u63a5\u6d88\u5931\u4e86<\/span>\n\n<span class=\"token comment\">\/\/ 3.\u5229\u7528indexOf\u53bb\u91cd<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>Array<span class=\"token punctuation\">.<\/span><span class=\"token function\">isArray<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">'type error!'<\/span><span class=\"token punctuation\">)<\/span>\n        <span class=\"token keyword\">return<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token keyword\">var<\/span> array <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>array <span class=\"token punctuation\">.<\/span><span class=\"token function\">indexOf<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">===<\/span> <span class=\"token operator\">-<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n            array <span class=\"token punctuation\">.<\/span><span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span>\n        <span class=\"token punctuation\">}<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token keyword\">return<\/span> array<span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span>\n<span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n <span class=\"token comment\">\/\/ [1, \"true\", true, 15, false, undefined, null, NaN, NaN, \"NaN\", 0, \"a\", {\u2026}, {\u2026}] \/\/NaN\u3001{}\u6ca1\u6709\u53bb\u91cd<\/span>\n\n<span class=\"token comment\">\/\/ 4.\u5229\u7528sort()<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>Array<span class=\"token punctuation\">.<\/span><span class=\"token function\">isArray<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">'type error!'<\/span><span class=\"token punctuation\">)<\/span>\n        <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    arr <span class=\"token operator\">=<\/span> arr<span class=\"token punctuation\">.<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token keyword\">var<\/span> arrry<span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span>arr<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!==<\/span> arr<span class=\"token punctuation\">[<\/span>i<span class=\"token operator\">-<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n            arrry<span class=\"token punctuation\">.<\/span><span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        <span class=\"token punctuation\">}<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token keyword\">return<\/span> arrry<span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span>\n     <span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n<span class=\"token comment\">\/\/ [0, 1, 15, \"NaN\", NaN, NaN, {\u2026}, {\u2026}, \"a\", false, null, true, \"true\", undefined] \/\/NaN\u3001{}\u6ca1\u6709\u53bb\u91cd<\/span>\n\n<span class=\"token comment\">\/\/ 5.\u5229\u7528includes<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>Array<span class=\"token punctuation\">.<\/span><span class=\"token function\">isArray<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">'type error!'<\/span><span class=\"token punctuation\">)<\/span>\n        <span class=\"token keyword\">return<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token keyword\">var<\/span> array <span class=\"token operator\">=<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">var<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span> <span class=\"token operator\">!<\/span>array<span class=\"token punctuation\">.<\/span><span class=\"token function\">includes<\/span><span class=\"token punctuation\">(<\/span> arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token comment\">\/\/includes \u68c0\u6d4b\u6570\u7ec4\u662f\u5426\u6709\u67d0\u4e2a\u503c<\/span>\n                    array<span class=\"token punctuation\">.<\/span><span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n              <span class=\"token punctuation\">}<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token keyword\">return<\/span> array\n<span class=\"token punctuation\">}<\/span>\n<span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n    console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token comment\">\/\/[1, \"true\", true, 15, false, undefined, null, NaN, \"NaN\", 0, \"a\", {\u2026}, {\u2026}] \/\/{}\u6ca1\u6709\u53bb\u91cd<\/span>\n\n\n<span class=\"token comment\">\/\/ 6.\u5229\u7528filter<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n  <span class=\"token keyword\">return<\/span> arr<span class=\"token punctuation\">.<\/span><span class=\"token function\">filter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">function<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">item<span class=\"token punctuation\">,<\/span> index<span class=\"token punctuation\">,<\/span> arr<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token comment\">\/\/\u5f53\u524d\u5143\u7d20\uff0c\u5728\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u7d22\u5f15==\u5f53\u524d\u7d22\u5f15\u503c\uff0c\u5426\u5219\u8fd4\u56de\u5f53\u524d\u5143\u7d20<\/span>\n    <span class=\"token keyword\">return<\/span> arr<span class=\"token punctuation\">.<\/span><span class=\"token function\">indexOf<\/span><span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">===<\/span> index<span class=\"token punctuation\">;<\/span>\n  <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span>\n    <span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n<span class=\"token comment\">\/\/[1, \"true\", true, 15, false, undefined, null, \"NaN\", 0, \"a\", {\u2026}, {\u2026}]<\/span>\n\n\n<span class=\"token comment\">\/\/ 7.\u5229\u7528\u9012\u5f52\u53bb\u91cd<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token keyword\">var<\/span> array<span class=\"token operator\">=<\/span> arr<span class=\"token punctuation\">;<\/span>\n        <span class=\"token keyword\">var<\/span> len <span class=\"token operator\">=<\/span> array<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span>\n\n    array<span class=\"token punctuation\">.<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">function<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">a<span class=\"token punctuation\">,<\/span>b<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>   <span class=\"token comment\">\/\/\u6392\u5e8f\u540e\u66f4\u52a0\u65b9\u4fbf\u53bb\u91cd<\/span>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">-<\/span> b<span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\n\n    <span class=\"token keyword\">function<\/span> <span class=\"token function\">loop<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">index<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>index <span class=\"token operator\">&gt;=<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n            <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>array<span class=\"token punctuation\">[<\/span>index<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">===<\/span> array<span class=\"token punctuation\">[<\/span>index<span class=\"token operator\">-<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n                array<span class=\"token punctuation\">.<\/span><span class=\"token function\">splice<\/span><span class=\"token punctuation\">(<\/span>index<span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n            <span class=\"token punctuation\">}<\/span>\n            <span class=\"token function\">loop<\/span><span class=\"token punctuation\">(<\/span>index <span class=\"token operator\">-<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/\u9012\u5f52loop\uff0c\u7136\u540e\u6570\u7ec4\u53bb\u91cd<\/span>\n        <span class=\"token punctuation\">}<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token function\">loop<\/span><span class=\"token punctuation\">(<\/span>len<span class=\"token operator\">-<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token keyword\">return<\/span> array<span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span>\n <span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n<span class=\"token comment\">\/\/[1, \"a\", \"true\", true, 15, false, 1, {\u2026}, null, NaN, NaN, \"NaN\", 0, \"a\", {\u2026}, undefined]<\/span>\n\n\n<span class=\"token comment\">\/\/ 8.\u5229\u7528Map\u6570\u636e\u7ed3\u6784\u53bb\u91cd<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">arrayNonRepeatfy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n  <span class=\"token keyword\">let<\/span> map <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Map<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n  <span class=\"token keyword\">let<\/span> array <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Array<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u6570\u7ec4\u7528\u4e8e\u8fd4\u56de\u7ed3\u679c<\/span>\n  <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> i <span class=\"token operator\">=<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> arr<span class=\"token punctuation\">.<\/span>length<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">++<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>map <span class=\"token punctuation\">.<\/span><span class=\"token function\">has<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>  <span class=\"token comment\">\/\/ \u5982\u679c\u6709\u8be5key\u503c<\/span>\n      map <span class=\"token punctuation\">.<\/span><span class=\"token function\">set<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> \n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span> \n      map <span class=\"token punctuation\">.<\/span><span class=\"token function\">set<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u5982\u679c\u6ca1\u6709\u8be5key\u503c<\/span>\n      array <span class=\"token punctuation\">.<\/span><span class=\"token function\">push<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n  <span class=\"token punctuation\">}<\/span> \n  <span class=\"token keyword\">return<\/span> array <span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span>\n <span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n    console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n<span class=\"token comment\">\/\/[1, \"a\", \"true\", true, 15, false, 1, {\u2026}, null, NaN, NaN, \"NaN\", 0, \"a\", {\u2026}, undefined]<\/span>\n\n<span class=\"token comment\">\/\/ 9. \u5229\u7528reduce+includes<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">return<\/span> arr<span class=\"token punctuation\">.<\/span><span class=\"token function\">reduce<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">prev<span class=\"token punctuation\">,<\/span>cur<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">=&gt;<\/span> prev<span class=\"token punctuation\">.<\/span><span class=\"token function\">includes<\/span><span class=\"token punctuation\">(<\/span>cur<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span> prev <span class=\"token operator\">:<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token operator\">...<\/span>prev<span class=\"token punctuation\">,<\/span>cur<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span>\n<span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\nconsole<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token comment\">\/\/ [1, \"true\", true, 15, false, undefined, null, NaN, \"NaN\", 0, \"a\", {\u2026}, {\u2026}]<\/span>\n\n<span class=\"token comment\">\/\/ 10.[...new Set(arr)]<\/span>\n<span class=\"token punctuation\">[<\/span><span class=\"token operator\">...<\/span><span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Set<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">]<\/span> \n\n\n<span class=\"token comment\">\/\/ 11. hasOwnProperty , \u53ef\u4ee5\u53bb\u91cd\u590d\u6742\u6570\u636e\u7c7b\u578b<\/span>\n<span class=\"token keyword\">function<\/span> <span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">arr<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">var<\/span> obj <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token keyword\">return<\/span> arr<span class=\"token punctuation\">.<\/span><span class=\"token function\">filter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">function<\/span><span class=\"token punctuation\">(<\/span><span class=\"token parameter\">item<span class=\"token punctuation\">,<\/span> index<span class=\"token punctuation\">,<\/span> arr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token keyword\">return<\/span> obj<span class=\"token punctuation\">.<\/span><span class=\"token function\">hasOwnProperty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">typeof<\/span> item <span class=\"token operator\">+<\/span> item<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">?<\/span> <span class=\"token boolean\">false<\/span> <span class=\"token operator\">:<\/span> <span class=\"token punctuation\">(<\/span>obj<span class=\"token punctuation\">[<\/span><span class=\"token keyword\">typeof<\/span> item <span class=\"token operator\">+<\/span> item<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span>\n<span class=\"token punctuation\">}<\/span>\n    <span class=\"token keyword\">var<\/span> arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'true'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span><span class=\"token boolean\">false<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">undefined<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">null<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">NaN<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">'NaN'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'a'<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">unique<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n<span class=\"token comment\">\/\/[1, \"true\", true, 15, false, undefined, null, NaN, \"NaN\", 0, \"a\", {\u2026}] \/\/\u6240\u6709\u7684\u90fd\u53bb\u91cd\u4e86<\/span>\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u6570\u7ec4\u53bb\u91cd\u65b9\u6cd5\uff08\u5305\u62ec\u590d\u6742\u7c7b\u578b\uff09\/\/1.ES6Set\u53bb\u91cd\uff08ES6\u4e2d\u6700\u5e38\u7528\uff09functionunique(arr){returnArray.from(newSet(arr))}vararr=[1,...","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[82],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/601"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=601"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/601\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}